Troward clark



(No Model.)

T. CLARK. PITMAN CONNECTION FOR MOWING MACHINE-S.

No. 487,403. Patented Dec. 6, 1892.

WITNESSES. INVENTOR. WWW W M of the same, showing in dotted lines the parts UNITED STATES PATENT OFFICE.

PITIVIAN CONNECTION FOR MOWlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No.

487,403, dated December 6, 1892.

Application filed June 14, 1892. Serial No.436,687. (N model.)

To all whom it may concern.-

Be it known that I, TROWARD CLARK, of Eastry, near Dover, in the county of Kent, England, have invented an Improvement in Pitman Connections for lliowing'lliachines, of which the following is a specification.

This invention relates to pitman connections for mowing-machines of the class in which a set of knives secured to a knife-bar is reciprocated between a set of projecting fingers secured to a finger-bar, and has ref- 1 erence to an improvement in the connection I of the knife-bar with the connecting-rod by which it is reciprocated, the special object of the improvement being to connect these parts in such a manner as to prevent them from working loose and becoming disconnected when in operation and to facilitate their disconnection when they are desired to be disconnected.

In the accompanying drawings, Figure 1 represents in perspective view part of the knife-bar of a mowing-machine of the class aforesaid and the improved means of connecting the same and the connecting-rod, showing the parts in connection and in position for work. Fig. 2 represents a side elevation in position for disconnection. sents a plan view.

4 represents the knife-bar, which may be of any ordinary formation and may work in connection with a finger-bar, also of any ordinary formation.

5 represents the connecting-rod, which may be operated in any ordinary manner. As the invention only has reference to the improvement in the connection of the knife-bar and connecting-rod, it has not been deemed necessary to illustrate the finger-bar or the means of operating the connecting-rod, both of which may, as aforesaid, be of any ordinaryarrangement.

In accordance with the said improvement Fig. 3 repre- I rivet or otherwise secure, as at 6, to the knife-bar 4 a knife-eye 7, adapted for pivotal connection with the connecting-rod and made integral with a boss 8 on the side thereof adjacent to the connecting-rod and extending for part of the width of the knife-eye. I make the knife-bar end of the connecting-rod 5, adapted for pivotal connection with the knifeeye, integral with an extending arm 90f a length corresponding with the width of the boss 8 and formed with a rectangular extension 10 at its extremity and adapted to abut against the outer side of the boss of the knifeeye when the parts occupy the relative positions represented in Fig. 1, so that the knife eye is normally maintained between oppos ing parts of the connectingrod and the knifebar end of the connecting-rod will be properly located and the parts will not be liable to work loose or to become disconnected.

When it is desired to disconnect the parts, the knife-bar is turned up about its pivotal connection 11 to the connectingrod until (wide the dotted lines in Fig. 2) the extension 10 of the rod 5 is in a position to override the boss 8, when the connecting-rod 5 can be disconnected by sliding its pin 11 laterally out of the knife-eye in the direction of the arrow 0,. By such means I avoid the disadvantages of the usual latches or like adjustable parts ordinarily arranged on the inner side of the connecting-rod and adapted to keep it in connection with the knife-bar, which parts are liable to be speedily worn away by the excessive friction against them of the reciprocating parts, in consequence of which the connecting-rod is liable to work loose and to become disconnected from the knife-bar, and I provide coacting parts which will not be liable to get loose from each other and will at all times reciprocate together.

I claim as my invention The combination, with the knife-bar, of the knife eye secured to the bar and having formed integrally therewith at its side next to the connecting-rod a boss extending part of the width of the knife-eye, so as to leave a space at the outer side of the knife-eye, and the connecting-rod having a pivot to fit in theknife-eye and an arm extending laterally from said rod and formed integral with a rectangular extension to lie in the space at the outer side of the knife-eye and against the outer side of its boss, substantially as and for the purposes described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. v

TROWARD CLARK.

Witnesses:

ALFRED CLARK, EDWIN JOHN CLARK. 

